Definition of emission in English:



mass noun
  • 1The production and discharge of something, especially gas or radiation.

    ‘the effects of lead emission on health’
    count noun ‘cuts in carbon dioxide emissions’
    • ‘It seeks to promote energy efficiency and alternatives to fossil fuels, and insists on reductions in the emission of greenhouse gases by the industrialised world in the hope that the climate may stabilise.’
    • ‘Global warming results from the emission of heat trapping gases, such as carbon dioxide and methane.’
    • ‘The Ministry of Finance is initiating a first on the Bulgarian market by the emission of euro-denominated bonds with a 15-year period of maturity.’
    • ‘Many options for limiting greenhouse gas emissions are available in the short and medium term.’
    • ‘Enormous environmental externalities also result from our over-dependence upon cars, especially in air pollution and in the emission of greenhouse gases.’
    • ‘There is also a specific obligation to prevent the emission of noxious or offensive substances into the atmosphere.’
    • ‘However, gasoline engines and generators on boats have no emission controls and can emit carbon monoxide in huge amounts.’
    • ‘When environmental issues first became a global concern, Britain was well placed to limit its emissions of noxious gases into the atmosphere.’
    • ‘Radioactivity is the process of emission of radiation as a radioactive material changes form, often to a different element.’
    • ‘The Environment Agency has given them a new permit to carry on burning tyres at the site, but has said emissions of noxious gases from the giant chimney must come down.’
    • ‘This random emission of photons leaves the resulting electron beam with a fuzzy, rather than a sharply defined focus.’
    • ‘Road transport is a major source of emission of primary pollutants, especially in cities.’
    • ‘I waited in silence, browsing through my CDs, deciding which one to play, when my meditations were disturbed by an ungodly sound, and the emission of an unrepeatable word from Jo.’
    • ‘An occupier may incur liability for the emission of noxious fumes or noise, although he has used the utmost care in building and using his premises.’
    • ‘Radiation emission from mobile phones must be cut by 80 per cent, a group of UK MPs said yesterday.’
    • ‘But even with this recent progress, we are far from any solution that reverses - or even reduces - the emission of global warming gas.’
    • ‘The effect of implementing the Kyoto Protocol, he says, would be to transfer vast sums of money from some countries to others without reducing the emission of greenhouse gases.’
    • ‘It can improve biodiversity, protect wildlife habitats, and prevent the emission of vast amounts of toxic chemicals into our water, air, and soils.’
    • ‘Natural sources of emissions of sulfur dioxide include volcanic eruptions and forest fires.’
    • ‘The energy master-plan emphasises investment in technology to reduce the emission of pollutants such as sulphur dioxide and nitrogen oxide through improvements in coal combustion.’
    discharge, release, outpouring, outflow, outrush, leak, excretion, secretion, ejection
    View synonyms
    1. 1.1count noun An ejaculation of semen.
      ‘nocturnal emissions’
      • ‘Even well into this century, versions of this dire belief - that one's bodily supply of energy could be squandered by sexual emissions - hung on.’


Late Middle English (in the sense ‘emanation’): from Latin emissio(n-), from emiss- ‘sent out’, from the verb emittere (see emit).